20602260640 has 96 divisors (see below), whose sum is σ = 52491390336. Its totient is φ = 7596180480.

The previous prime is 20602260629. The next prime is 20602260641. The reversal of 20602260640 is 4606220602.

It is a junction number, because it is equal to n+sod(n) for n = 20602260599 and 20602260608.

It is not an unprimeable number, because it can be changed into a prime (20602260641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1538775 + ... + 1552105.

It is an arithmetic number, because the mean of its divisors is an integer number (546785316).

Almost surely, 2^20602260640 is an apocalyptic number.

20602260640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20602260640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26245695168).

20602260640 is an abundant number, since it is smaller than the sum of its proper divisors (31889129696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20602260640 is a wasteful number, since it uses less digits than its factorization.

20602260640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14102 (or 14094 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

It can be divided in two parts, 206022 and 60640, that added together give a palindrome (266662).

The spelling of 20602260640 in words is "twenty billion, six hundred two million, two hundred sixty thousand, six hundred forty".